1306420923 has 4 divisors (see below), whose sum is σ = 1741894568. Its totient is φ = 870947280.

The previous prime is 1306420919. The next prime is 1306420963. The reversal of 1306420923 is 3290246031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3290246031 = 3 ⋅1096748677.

It is not a de Polignac number, because 1306420923 - 2² = 1306420919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306420963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217736818 + ... + 217736823.

It is an arithmetic number, because the mean of its divisors is an integer number (435473642).

Almost surely, 2^1306420923 is an apocalyptic number.

1306420923 is a deficient number, since it is larger than the sum of its proper divisors (435473645).

1306420923 is an equidigital number, since it uses as much as digits as its factorization.

1306420923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435473644.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1306420923 is about 36144.4452578816. The cubic root of 1306420923 is about 1093.1867917091.

Adding to 1306420923 its reverse (3290246031), we get a palindrome (4596666954).

The spelling of 1306420923 in words is "one billion, three hundred six million, four hundred twenty thousand, nine hundred twenty-three".